Ingot-mold.



J. I. PEYTON & S. E. HITT.

INGOT MOLD.

' APPLICATION FILED AUG-22, I914- 1,139,219. Patented May 11, 1915.

W|TNEssEs-; INVENTQRSz- I I fi UNITED STATES PATENT OFFICE.

JOSEPH I. PEYTON AND SAMUEL E. HITT, OF SYDNEY, NOVA SCOTIA, CANADA.

INGOT-MOLD.

Specification of Letters Patent.

Patented May 11, 1915.

"Molds, of which the following is a speci cation.

Our invention relates to improvements in ingot molds, and it consists in the constructions, combinations, and arrangements herein described and claimed.

An object of our invention is to provide an improved ingot mold adapted to minimize the defects due topipes, blow holes, cavities, and segregation usually found in ingots.

A further object of our invention is to provide a strong and durable metallic ingot mold formed with an interior vacuum chamber for efficiently retarding the radiation of heat from the upper portion of the cast ingot.

In the accompanying drawings: Figure 1 is a central, vertical section ,.of an ingot mold, illustrating one embodiment--oiQQl r invention; Fig. 2 is a section on the line a2-w of Fig. 1; Fig. Sis an enlarged, detail section on the line g y of Fig. 2; Fig. 4 is a view similar to Fig. 3, illustrating a modified construction; Fig. 5 is a detail section on the line z-z of Fig. 4; Fig. 6 is a front view of the closure valve shown in Fig. 4:, and Fig. 7 is a detail, front elevation of the construction shown in Figs. 4. and 5 for protectin the valve.

Re erring to the drawings, 1 indicates an open top ingot mold having a vacuum chamher 2 formed in its side walls and spaced from the top thereof suiiiciently to provide a relatively thick top wall to said chamber; the side walls of saidmold being thickened to provide the vacuum chamber 2 with substantial, heavy outer and lower walls. This provides an improved construction, in which the vacuum chamber 2 is provided with relatively thick upper and lower walls connecting the inner and outer walls of said cham-. ber; thereby providin eflicient means for conducting heat from the top and bottom of said inner walls uniformly throughout said top and bottom portions. This improved construction insures a continuous and uniform conduction of heat from the inner walls of the vacuum chamber-2; thereby preventing deterioration or destruction of the mold by disadvant'ageously high heating of the inner Walls of the vacuum chamber 2 from the hot cast metal in contact therewith, and avoiding injurious irregular or localized cooling of said inner Walls;

As shown in Fig. 3, an outlet 4 from thevacuum chamber 2 communicates with a pipe plug 5, which latter is secured to the mold and adapted to be connected to any suitable device, such as an air pump, for exhausting the air from said vacuum chamber. The pipe plug 5 is shown with its walls pinched together and bent over at 6, to effectively seal the vacuum formed in the chamber 2; if desired, the pipe plug may be heated to redness to facilitate such sealing operation.

Figs. 4, 5, 6, and 7 illustrate an advantageous form of closure for sealing the vacuum formed in the chamber 2, which comprises a short pipe 7 secured to the mold in communication with outlet 4 of the vacuum chamber, and provided with a valve 8 having a handle 9; a threaded nipple 16 being shown on said valve for convenient connection to,

any suitable device for exhausting the air from said-chamber 2.

.Our improved construction provides a compact and strong means for protecting the valve 8 from the slag or metal overflow, or from accidental opening, which consists of a projecting hood 10 and a shield 11 pivoted at 12 in cars beneath said hood. As shown especially in Fig. 4, the pivoted shield 11 extends over'the valve 8, and is adapted to be clamped securely in closed position by a rod 14 inserted through perforated lugs 15 on the mold; said clamping rod 14 being shown locked in position by bending its ends down over said lugs 15.

The valve 8 is so positioned that its actuating handle 9 is confined against turning, from the closed position of said valve, by the adjacent faces of the shield 11 and mold 1; thereby preventing accidental shifting or jarring of the valve to open position.

In the operation of our invention, the air is exhausted from the, vacuum chamber 2, and the mold filled with molten metal to a level approximating the top of said chamber. During the cooling and solidification of the cast metal in the mold, the heat imparted to the inner walls of the vacuum chamber by the hot metal in contact there-' with will be gradually and uniformly conducted from said inner walls by the relatively thick top andbottom walls of said uniform insulating action of the vacuum chamber, and avoiding danger of injury to the inner wallsjof said chamber by excessively high heating thereof, or by irregular or localized cooling. I

Our invention, thus, provides a strong and durable ingot mold in which the vacuum chamber constitutes a highly efficient heatinsulating means for materially retarding the cooling and solidification of the upper portion of. the cast metal in the mold; thus minimizing. the defects due to piping, blow holes, cavities, and segregation in the cast ingot.

We have illustrated .and described preferred and satisfactory constructions, but

changes could be made within the spirit and scope of our invention.

um chamber formed in its side walls and spaced from the top of the mold toprovide a relatively thick upper-wall for such vacuum chamber.

'2. An open top ingot mold having a vacuum chamber formed in. its side walls and spaced from the top of the moldto provide a relatively thick upper wall for such vacuum chamber, the upper portion of the mold walls being thickened to provide heavy lower and outer walls for such vacuum chamber. 1

3. An open top ingot mold having a vacuum chamber in the upper portion of its side walls, a manually-operated closure secured to the outer face of the mold in communica- 7 said shieldin closed position. 1. An open top ingot mold having a vacution with such vacuum chambers and a protectin hood projecting from the mold above said 0 o'sure.

4. An open top ingot mold having a vacu-.

,um chamber in the upper portion of its side walls, a manually-operated closure secured to theouter face of the mold in communication with such vacuum chamber, a protect-- walls -a closure for such vacuum chambersecured to the mold, an actuating handle for said closure, a shield for inclosing said closure and confining said actuating handle against shifting, and means for clamping 6. An open top ingot mold having a vacuum chamber in the upper portion of its side walls, a closure for such vacuum chamber secured to the outer face of the mold, a protecting hood projecting from the mold above said closure, an actuating handle for said closure, a shield pivotedbeneath said hood for inclosing said closure and confining said handle against shifting, and means for clamping said shieldin closed position.

In testimony whereof we aiiix our signatures in the presence of two witnesses.

. JCS- I. PEYTON.

SAMUEL E. HITT. Witnesses:

IDA M. Hrr'r, ETHEL C. DANIELS. 

